Whipped Cream Frosting - cooking recipe

Ingredients

3/4 c. sugar
3/4 c. warm milk
1 egg
3 Tbsp. flour
1/2 c. butter or margarine
1/2 c. shortening
1/2 tsp. milk
1 tsp. vanilla

Preparation

Mix sugar, warm milk, egg and flour with egg beater or wire whisk.
Cook very slowly, stirring constantly until it thickens. (I use a small SilverStone frypan to prevent it from sticking.) Cool completely.
Cream butter, shortening, 1/2 teaspoon of milk and vanilla.
Beat in cooled, cooked mixture.
Beat until fluffy, about 5 minutes.